Spectral and temporal cues in cochlear implant speech perception

Objective: Taking advantage of the flexibility in the number of stimulating electrodes and the stimula-tion rate in a modern cochlear implant, the present study evaluated relative contributions of spectral and temporal cues to cochlear implant speech per-ception. Design: Four experiments were conducted by using a Research Interface Box in five MED-EL COMBI 40 cochlear implant users. Experiment 1 varied the number of electrodes from four to twelve or the maximal number of available active electrodes while keeping a constant stimulation rate at 1000 Hz per electrode. Experiment 2 varied the stimula-tion rate from 1000 to 4000 Hz per electrode on four pairs of fixed electrodes. Experiment 3 covaried th